$RandomState
 Usage
• $RandomState gives a representation of the internal state of the pseudorandom generator used by Random.
Notes
• The value of $RandomState changes every time Random is called. • You can use s = $RandomState to explicitly save the value of $RandomState, and $RandomState = s to restore. • The value of $RandomState is always a long integer chosen from a certain large set of possibilities. You can assign $RandomState only to values in this set. • You can use Block[{$RandomState}, expr] to localize the value of $RandomState during the evaluation of expr. • New in Version 3.
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